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In vitro and in vivo efficacies of amlodipine against Listeria monocytogenes

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Abstract

Listeria monocytogenes causes suppurative gastritis in BALB/c mice. We investigated the effect of the antihypertensive drug amlodipine (Aml) on the growth of L. monocytogenes in vitro and in vivo. Aml showed noteworthy inhibitory action (minimum inhibitory concentration, MIC90 32 µg/ml) against Listeria strains and demonstrated cidal (minimum bactericidal concentration, MBC 64 µg/ml) activity. Aml administered orally at 2.5 µg/g in female BALB/c mice for 7 days, commencing 4 days before oral challenge (1 × 108 CFU/ml with L. monocytogenes ATCC 51774), significantly reduced bacterial counts in the stomach (P < 0.01), liver (P < 0.01), and spleen (P < 0.05), and decreased (P < 0.05) gastric lesions, neutrophilic infiltration, edema, vascular degeneration, and necrosis of gastric tissues. It caused the down-regulation of expression of inflammatory cytokines (IFN-γ, IL-1β, and TNF-α) compared to drug-free control. Aml may be used in the presence of an antibiotic as adjunct therapy that boosts the host immunity against Listeria. Further, QSAR studies might contribute in manipulating it as a lead compound for the synthesis of new, more effective non-antibiotics (helper compounds), perhaps devoid of side-effects, that could be recommended as compassionate therapy for listeriosis.

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Authors and Affiliations

  1. Division of Microbiology, Department of Pharmaceutical Technology, Jadavpur University, Kolkata, 700032, India

    N. K. Dutta, K. Mazumdar, A. DasGupta & S. G. Dastidar

  2. Microbiology Section, Herbicure Healthcare Bio-Herbal Research Foundation, 7 & 8 Metro Garden City, D. H. Road, Pailan, Kolkata, 700104, India

    A. DasGupta & S. G. Dastidar

Authors
  1. N. K. Dutta
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  2. K. Mazumdar
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  3. A. DasGupta
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  4. S. G. Dastidar
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Corresponding author

Correspondence to S. G. Dastidar.

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Dutta, N.K., Mazumdar, K., DasGupta, A. et al. In vitro and in vivo efficacies of amlodipine against Listeria monocytogenes . Eur J Clin Microbiol Infect Dis 28, 849–853 (2009). https://doi.org/10.1007/s10096-009-0703-y

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  • DOI: https://doi.org/10.1007/s10096-009-0703-y

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